Method of constructing valve cages



Oct. 27, 1931. T EN 1,829,022

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Patented Oct. 27, 1931 UNITED. STATES PATENT- OFFICE EDWARD E.STEVENSON, LOS ANGELES, CALIFORNIA, ASSIGNOR '10 EMSCO DERRICK ANDEQUIPMENT COMPANY, OF LGS ANGELES, CALIFORNIA.

' METHOD OF CONS'ZllR-UC'IIN'G VALVE CAGES Application filed January11,1830. Serial No. 418,265.

This invention relates to a method applicable more particularly to theformation of valve cages but adapted to the formation of other hol owbodies having a cylindrical interior chamber provided with lateralopenings.

An object of the invention is to provide a method of constructing valvecages in an inexpensive manner by the act of forging metal instead'ofutilizing castings for this purpose as has heretofore commonly beendone.

Another object of the invention is to reduce the time and labor requiredin the formation of valve cages and the like by eliminating the dnecessity of using a finishing tool or method to smooth off the interiorwall of the finished article..

Other objects, advantages and features of invention may hereinafterappear.

Referring to the accompanying drawings which illustrate what is, atpresent deemed to be a preferred embodiment of the invention,

Fig. 1 is a combined elevation and half sectional view of the moldedform or blank before drilling operation has been performed thereon. Thesectioned portion 0 this view is taken on line 11 of Fig. 2.,

Fig. 2 is a cross section on line 2-2 of Fig. 1.

Fig. 3 is a combined elevation and half sectional view of the moldedform or blank after the drilling operation has been performed thereon.The sectioned portion of this view is taken on line 33 of Fig. 4.

4 is a cross section on line 44 of Fig. 3.

Fig. 5 isa view, partly in side elevation and partly in verticalmid-section, showing the device in its operative position with a ballvalve therein and a portion of a pump as sembly included in the view.

Referring in detail to the drawings, the forged body shown comprises acylindrical end or base portion 7 which is axially in line with, butspaced away from another cylindrical portion 8 of less diameter thatforms the opposite end portion of the body. Said end portions 7 and 8are united to each other in the finished article by means of a series ofradially projecting longitudinallyextending ribs 9. These ribs arepreferably arranged in equal circumferentially spaced relation to eachother, and in the finished article are separated from each other by theopenings 10 which communicate with thecylindrical valve chamber 11 heaxis of which coincides with a the axis of the hody as a Whole.

Before the chamber 11 is drilled out the space to be occupied thereby isoccupied by a solid portion 15 which is of less diameter than thediameter of the intended valve chamber. The body thus formed is drilledinan axial iii-through its base or .largeend portion 7 and the bore iscontinued'a sufficient distance to remove all of the solid part 15 andto extend into the tapered lower end 8a of the smaller cylindricalportion 8 the desired distance, desirably to about the point illustratedin the drawings. After this has been done drill of greater diameter maybe used to enlarge the outer portion of the bore formed by the drillfirst used, in order to provide the diametrically enlarged portion 17below the valve chamber.

The completed valve cage is provided at its upper end with a socketedshank 19'which is attached to the lower end portion 20 of the pump rod.p

The ball valve will be located within the chamber 11, and the seatmember therefor will be secured within-the enlarged bore portion 17.

' In Fig. 5 the device is shown illustrated, by way of example, in anoperative relatlon to a pump barrel of the multiple check valve type. Inthis view an annular valve seat 31 is shown in the assembly held inplace by the screw threaded portion 32 of the pump barrel and affordinga seatfor the ball valve 33. The entire structure shown is reciprocablysupported by the pump rod 20.

Claims:

1. The method of constructin a valve cage whichconsists in forming aloody having a base portion of greater cross sectional extent than theintended valve chamber, said body having, adjoining said base portion, apart some diameters of which are less and other diameters of whicharegreater than the ioo intended valve chamber; and finally forming a borewhich extends throu h said base portion and also into said part liavinglessened diameters.

2. The method of constructing a valve cage which consists in forming abody with a base portion atone end and a longitudinally ribbed portionadjacent to said base portion, the diameter through the ribbed portionbetween the ribs thereof being less than the diameter of said baseportion; and finally in boring through said base portion and into saidribbed portion thereby forming a chamber having side openings betweensaid ribs.

3. The method of constructing a valve cage which consists in forming agenerally cylindrical body, said body having depressions in the sidesthereof which are spaced away from one end thereof, and finally inboring into and through said end of said body to a sutfficient depth toprovide in conjunction with them a chamber having side openings.

4. The method of constructing a valve cage which consists in forming abody having substantially cylindrical end portions axially in line witheach other and spaced apart from each other, one of said cylindrical endportlons being of greater diameter han the other, there being aplurality of longitudinal ribslocated'between said cylindrical endportions,the diameters of said body between said ribs being less thanthe diameter of the smaller of said cylindrical end portions; andfinally in boring a chamber through the larger of said cylindrical'endportions thence through said ribbed portion and into the smaller of saidcylindrical end portions, the diameter of the bore being greater thanthe diameter of the ribbed portion of the body between the ribs thereof.

In testimony whereof I hereunto aliix my signature.

EDWARD E. STEVENSON.

